Pressure-controlled valve.



H. W. O'DOWD.

" PRESSURE CONTROLLED VALVE.

APPLICATION FILED APR. 5, 1909'.

Patented Feb. 18 1913;

WI N ESSES UNITED STATES PATENT OFFICE.

HENRY w. OIDQWD,- OI PEEK8KIIJB, NEKYOBK, ASSIGNOB TO WILLIAM 1L CRANE comm,

ash-a 1 at n Be itknown that I, HENRY W. OUowp, a citizen of the United States, a'nda resident of Peekskill, count of \Vestchester, andState'of New York, have invented certain ne wfan d useful Improvements inPressure-Controlled Valves, of which a e-"01 lowing isa specification. A. I

My invention relates to valve mechanisms, and more particularly to valves for automatically controlling the flo'wof'one fluid by variations in the pressure of another, as for automatically controlling the supply of drocarbon fuels byvariations in the pressure of thesleam.

Objects of the invention are to provide an improved construction of the character'referred to which shall be hi hly sensitive to variations in the pressure of the controlling fluid; which shall be proof against leakage of either fluid; which shall provide that the minimum of fluid remains in the valve mechanism when the valve is in its closed position} and which shall be simple :and durable in construction, with parts few, easily accessible and compactly arranged, and economical and highly efficient in op eration.", These and other objects of v the invention lwill in art be obvious and in part be made clear rom the following descrip-. tion.. g

Theinvention consists inthe novel parts, improvements, combinations, and features of construction herein shown and described.

Theaccompanyin drawing, which is referredtohcrein an forms a part hereof, illustrates an embodiment of the invention, the same serving in connection with the descri tion herein to explain the principles of t ie invention. ,7 v Thedrawing is a vertical central section of an, automat c fuel controlling valve combincd with'steam pressure controlling means constructed in accordance with my, inveiiacmev f' Referring 'now "in detail to the drawing, the embodiment of the invention: illustrated comprises. a: casing 1' adaptedto be secured in communication with a source of fi ielf su rv p y"... sg .,s sipipe;1 ndco a P e ee. ably in itslower portion a" fuelor-gas'pas sage whichfasshown, is divided bya' diaphra 'm 2 into compartments 3 and 4'. "z

A Teature of the invention relates to the portion a conromnonr'or-nw YORK.

" ii inn ssmcomoinm i m amaaaaa mm Patented Feb.18,1913. Application mum s, 1909. Serial m. 487,862.

means for establishing and interrupting communication between said compartments.

In the'embodiment of the invention illustrated'ports 5 and 6 are preferably formed in"the respective upper portions of'these compartments, a flange 7 preferably outlining one of said ports and extending slightly ;above the port and forming a valve seat. As shown, also, a flange 8, preferably with its upper surface in the same horizontal plane'as theupper surface of the flanged valve seat 7, encircles the casing 1 on its inner face. fuel to steam generator burners using hy- "Means are provided to operate on the valve seat 7 and thus establish and cut off the' supply, of as or other fuel passing throu h the m'ec anism. While said means may e'formed and arranged in various ways'and ofdifierent materials, preferably it consists of a member consisting of a valve 1proper, and an extension thereof, the who e forming a diaphragm 10, pref er'a'bl of flexible material, such as leather, whic e'ntends, to and is seated upon the flange 8,' where, in the embodiment illustrated, it is tightly engaged by a cap piece 12/of the casing, said cap piece, as shown, being exteriorly threaded to correspond with theinteri'or threading of that art of the "casing. It' will be seen that 'sai valve diaphra m forms' the upper wall of a chamber whie "communicates with said com artmentsB and 4"and'which varies in v0 ume with the operation of the valve, whose flexibility"p'ermits of its operation, and that said chamber, when the valve is in its seated position, is of very slight volume, thus preventing the accumulation of gas and air in any material amount in said valve chamber andthus obviating the evil effects of such accumulation, such as back firing. It will also be noted that as said diaphragm is tightly fastened to the flange 8, leakage into the/casing above said valve is prevented. Furthermore, as will be a parent, the valve is kpt alw'ays'flexible an in good order by its operation, and ridges and indentations, wln'c 'mlght in time permit leakage, are av i d According'to another'fe'at'ure'of the invent 1on, meansf are provided for automaticallyo'pera'ting'th'e valve in unison with the variations in ressu're of the steam in the generator; an while so far ascertain features of the invention are concerned any suitable means may be provided for this purppsqr preferablyandz as shown; in. a chamr 15 formed in the u perpart of said-casing is-arr'anged a'diap ragm16, preferably ofja' flexible material adapted to resist corrosioiilby thesteama As shown, also,"said' diaphragm extends.- entirely througlrsaid chamber 15 and is seated uponthe periphery of the casing, where it is tightly engagedby'a second cap piece 17 which is, as shown,. bolted to andforms part of the easing; thus-making a joint proofagainst steam leakagef jgThe' chamber 15 communicates through apipe18-with the steam generator, n'otshown'.;1

It will be apparent that as the pressure of the steam in the generator varies, so will the pressure'vary upon the diaphragm 16'. Suitable connecting means are therefore provided between the diaphragm 16 and thevalve diaphragm 10 so that this variable steampressure upon the diaphragm 16 may be communicated to said.valve'10 that the latter may be operated in unison with the movement of the diaphragm 16. In the embodiment of the invention illustrated a stem 19 is rigidly secured to the diaphragm 16 in a manner to prevent leakage and extends through tlie casing 1', passing through the port 5 and chamber 4' and emerging from the bottom of the casing. The valve 10' is suitably andsecurely fastened to said stem 19 with a vapor-proofjoint' and, preferably, a rigid. member 20' lies above and holds the valve, when in its seated position, more closely to its seat. It will be apparent thatas the diaphragm 16 is depressed by the pressure of the steam, the valve 10"will also be depressed towardor to the valve seat 7. In order however that the valve maybe kept in a normally open position or unseated upon the reduction of the steam pressure, suitable means are provided which, preferably and as shown, c'onsistof aspring 21' coiled about the stem 19 "outside and beneath the casing 1, said spring being engaged by a yoke 22suitably 'secured'to said casing and by a collar 23' upon the'st'em' 19; In order that the spring 21" may be controlled in its operation, said collar 23 is threaded upon said stem 19'and' maybe adjustedat will to determine the tension of the spring and thusth'ej extent to which the valve 10 will be openedfthereby. will be seerrthat" when the pressure in the generator reaches a' predeterminedpoint, the pressure on'the 'diaphra'gm 16 willovercome the force of'fthezspring' 21 and close the'valve 10; when thepressureis reduced, the spring will automaticallyopen the-valvetf- Itj'willbe seen that by reasoncf the construction shown and described a. formof automatic fuel valve mechanism'is'provided which is simple, efiicient and safe, and particularly well adapted for steam generator burners using gas or other fluid fuel. Other advantages will be apparentto those skilled in the art.

It is to be understood that my invention in' its broader-aspects is not limited to the precise construction shown nor to any particular construction by which the same has been or may be carried into eil'ect, as many changes may be made in the details of the parts without departing from the main principles of the invention and without sacrificing its chief advantages.

I claim:

1. An automatic valve-mechanism including in combination, a casing, a gas-passage extending" therethrough, a vchambers in said casing 1n alinement with plurality of said passage, a main chamber overlying said plurality of chambers, a diaphragm interposed between said main chamber and said plurality of chambers and adapted to control communication between said plurality of chambers, a pressure-chamber disposed remotely from said main chamber, a diaphragm mounted in said pressure-chamber, aconnection between the diaphragm therein and said first-mentioned diaphragm and adapted to position the latter in relation to the plurality of chambers, and means forming a leakage-tight separation between the main chamber and the ressure-chamber.

2. An automatic valve-mechanism for a steam generator including in combination, a casing, a s-passage therethrough, a partition dividing said passage into a. lurality of chambers, ports formed in said chambers, a main chamber overlying said first-mentioned chambers, a valve-diaphragm arranged in said main chamber and adapted to operate on one of said ports, a pressure-chamber attached to said casing, a diaphragm located in said pressure-chamber and adapted to be operated by pressure within the pressure-chamber, a stem connecting said diaphragms, and a leakage tight joint bei tween the main and pressure-chambers whereby fluid within the pressure-chamber is prevented from entrance into the main chamber, and means for normally maintaining said valve-diaphragm in unseated position.

3. A valve-mechanism including in combmation, a casing provided with inlet and outlet openings, a pressure-chamber separably mounted upon said casing, a pair of chambers formed in said casing, a main chamber also formed in said casing and closed against passa e of a fluid either from said pair of charm ers or from said pressurechamber; a. respectively 1n the pressure and main-chambers and connected for co-action', one of said diaphragms bein disposed between the main chamber and port between the main chamber and the inthe pair of chambers, a

pair of diaphragms arranged 1 and means in the casing for vthe diaphragm in the main .0 amber normally unseated from said port.

said casing and dividing the same pair of chambers communicating by a port, a diaphragm seated on said port, a cap-piece secured to the With said diaphragm, forming a main chamber, a pressure-chamber attached to said cap-piece and closed against passage of fluid therefrom into said main chamber, a diaphragm located in said pressure-chamber, a stem extending between said diaphragms for effecting their coaction, and adjustable means supported by said casing and attached to said stem for normally holdin the first-mentioned diaphragm unseate from said port.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing Witnesses.

HENRY W. ODOWD.

Witnesses:

GEO. H. SoUoDEn, R. L B

into a' 

